CBSE 2025 · Region 6 · Set 1 · Q9 · 1 mark
Two coherent waves, each of intensity $\displaystyle \mathrm{I}_{0}$, produce interference pattern on a screen. The average intensity of light on the screen is :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 2 \mathrm{I}_{0}$
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CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.